Senior R Developer

NPL Markets

Remote

Present - 2022

• Productionised existing codebase and developed tools for analysts / data scientists, such as: a {pagedown} reporting template, a {ggplot2} theme, an internal (CRAN-like) package repository etc.
• Added new features to and improved functionality of existing R and Shiny projects (NPL Markets Analytics, Valuation and Marketplace platform).
• Build an internal repository for R packages with {drat} and GitHub pages
• Introduced DevOps practices with GitHub Actions (R CMD checks, automatic deployment to internal package repository, linting, tagging and versioning etc)
• Improved code review processes and introduced software development best practices (code modularisation, unit testing, snapshot testing, etc).
• Tools used: R, RStudio, VSCode, Shiny, GitHub (including Actions), HTML, CSS, SQL

Open Source Developer Apprentice

Voltron Data Labs

Freelance - Remote

2022 - 2021

• Software development and maintenance tasks for the Apache Arrow open source software project.
• Scoped and led the implementation of the date-time functionality in the {arrow} R package.
• Reviewed pull requests submitted by other contributors.
• Triaged and solved bugs (both user-reported and picked-up by the Arrow continuous integration systems).
• Improved unit test coverage and continuous integration workflows.
• Created and improved user and developer facing documentation.
• Tools used: Jira, GitHub, R, R6 and S3 object-oriented systems, C++, etc.

Senior Data Scientist

Typeform

Remote

2021

• Lead data scientist for VideoAsk, a new Typeform product, where I established the data science function.
• Developed a 1-year road map for better leveraging data to shape product and business strategies.
• Established data collection, tracking, data pipelines and AB testing frameworks.
• Prepared the first data-led financial annual forecast for 2022.
• Provided analytical support for consumer, growth, marketing and product teams.
• Tools used: R, RStudio, GitHub, SQL, DataBricks, Amplitude, Full Story.

Senior Data Scientist

The LEGO Group

London, UK

2021 - 2020

• Helped LEGO understand how its marketing expenditure contributes to consumer sales and brand strength.
• Built Bayesian market mix models to explain and attribute brand strength.
• Improved workflows, data and codebase quality by introducing software development best practices.
• Mentored and coached team in package building, test-driven development, production-level code etc.
• Wrote several internal packages (e.g. {ggplot2} theme, internal utilities, etc).
• Tools used: R, RStudio Server, GitLab, Shiny.

Data Science Consultant

Mango Solutions

London, UK

2020 - 2018

• Enabled companies achieve business goals from their data.
• Built a modularised, packaged Shiny app and an accompanying R package for exploring clinical trials data (covering graphs and tables).
• Built data-cleaning and wrangling pipelines flowing into machine learning processes.
• Developed client R packages to handle tasks, such as: reporting, data ingestion, data cleaning, data wrangling, feature engineering and predictive modelling.
• Predicted propensity to churn for a client in the leisure industry using gradient boosted trees.
• Forecasted sales of several drug-country combinations for a pharmaceutical company using various time series and machine learning models.
• Developed and improved R training materials.
• Tested multiple R packages using the {testthat} testing framework as part of ValidR.
• Tools used: R, RStudio, GitLab, GitHub, Shiny,

Data Scientist/ Statistician

Department for Business, Energy and Industrial Strategy

London, UK

2017 - 2016

• Improved the quality of UK business data feeding into key policy areas.
• Linked education and revenue data for the first time in the UK to chart the transition of graduates into the workplace.
• Automated the production of official statistical publications by moving from SPSS, Excel, and Word to SQL, R and RMarkdown.
• Built a geospatial machine learning model using a density-based spatial clustering algorithm to inform the UK industrial strategy.
• Created and delivered introductory-level training courses in R and QGIS.

Assistant Manager

Cycle Surgery

London, UK

2015 - 2014

• Ran one of the biggest cycling shops in London with 20+ staff. Increased year-on-year turnover by 20 percent.

Analyst

Romanian Financial Supervisory Authority

Bucharest, RO

2013 - 2007

• Represented the Commission and Romania in technical working groups at EU and national level.
• Gathered, interpreted, analysed data and developed solutions to policy challenges.
• Produced and delivered research insights into relevant areas (e.g carbon trading, investor protection, etc.).

Programme Manager

Center for Protected Areas and Sustainable Development - Bihor

Oradea, RO

2005 - 2004

• Coordinated the most complex programme of the NGO: the Apuseni Experience ecotourism programme. Designed, developed and implemented its first business plan.

MSc Environmental Sciences and Policy

Central European University

Budapest, HU

2006 - 2005

• Outstanding Academic Achievement Award (highest GPA)

BA Sociology with Statistics

Babes-Bolyai University

Cluj-Napoca, RO

2003 - 1999